Detalles de publicación
PP 018020
THE UPDATED BASTI STELLAR EVOLUTION MODELS AND ISOCHRONES: I. SOLAR SCALED CALCULATIONS
(1) Instituto de Astrofısica de Canarias, (2) Department of Astrophysics of University of La Laguna, (3) INAF-Osservatorio Astronomico d’Abruzzo, (4) Astrophysics Research Institute Liverpool John Moores University, (5) Dipartimento di Fisica e Astronomia - Universitá a degli Studi di Bologna, (6) INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, (7) Kapteyn Astronomical Institute University of Groningen, (8) Stellar Astrophysics Centre Department of Physics and Astronomy Aarhus University
ABSTRACT
We present an updated release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar model and isochrone
library for a solar scaled heavy element distribution. The main input physics changed from the previous BaSTI release
include the solar metal mixture, electron conduction opacities, a few nuclear reaction rates, bolometric corrections, and
the treatment of the overshooting efficiency for shrinking convective cores. The new model calculations cover a mass
range between 0.1 and 15 M⊙, 22 initial chemical compositions between [Fe/H]=−3.20 and +0.45, with helium to metal
enrichment ratio dY /dZ=1.31. The isochrones cover an age range between 20 Myr and 14.5 Gyr, take consistently into
account the pre-main sequence phase, and have been translated to a large number of popular photometric systems.
Asteroseismic properties of the theoretical models have also been calculated. We compare our isochrones with results
from independent databases and with several sets of observations, to test the accuracy of the calculations. All stellar
evolution tracks, asteroseismic properties and isochrones are made available through a dedicated Web site.
We present an updated release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar model and isochrone
library for a solar scaled heavy element distribution. The main input physics changed from the previous BaSTI release
include the solar metal mixture, electron conduction opacities, a few nuclear reaction rates, bolometric corrections, and
the treatment of the overshooting efficiency for shrinking convective cores. The new model calculations cover a mass
range between 0.1 and 15 M⊙, 22 initial chemical compositions between [Fe/H]=−3.20 and +0.45, with helium to metal
enrichment ratio dY /dZ=1.31. The isochrones cover an age range between 20 Myr and 14.5 Gyr, take consistently into
account the pre-main sequence phase, and have been translated to a large number of popular photometric systems.
Asteroseismic properties of the theoretical models have also been calculated. We compare our isochrones with results
from independent databases and with several sets of observations, to test the accuracy of the calculations. All stellar
evolution tracks, asteroseismic properties and isochrones are made available through a dedicated Web site.